Out-of-bounds read in Linux kernel

1) Out-of-bounds read

EUVDB-ID: #VU30980

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-9289

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local authenticated user to gain access to sensitive information.

In the Linux kernel before 4.1.4, a buffer overflow occurs when checking userspace params in drivers/media/dvb-frontends/cx24116.c. The maximum size for a DiSEqC command is 6, according to the userspace API. However, the code allows larger values such as 23.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.1.1 - 4.1.3

External links

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1fa2337a315a2448c5434f41e00d56b01a22283c
http://github.com/torvalds/linux/commit/1fa2337a315a2448c5434f41e00d56b01a22283c
http://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.4

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.